drshell

This project is for learning rust. It supports some basic built-in commands, pipeline, redirections and simple completions.

functions

built-in commands

the built-ins support the arg "-h" to show their descriptions.

• echo
• exit
• type
• pwd
• cd
• lsbuiltin
• history
• cp

redirections

• > or 1> (redirect stdout to write to a new file)
• >> or 1>> (redirect stdout to append to a file)
• 2> (redirect stderr to write to a new file)
• 2>> (redirect stderr to append to a file)

pipeline

Use the operator "|" to create pipeline.

warnings

The pipeline and redirections depend on the os threads, therefore, the installation path of this application needs to be added to the environment variable $PATH.